Note 3 - Restricted Cash and Cash Equivalents and Restricted Investments Available for Sale (Tables)

6 Months Ended

Jun. 30, 2012

Restricted Cash And Investments Current Item Description [Table Text Block]

	June 30, 2012		December 31, 2011
Restricted cash and cash equivalents	$	750	$	13,449
Restricted investments available for sale:
U.S. Treasury Notes		0		5,007
Corporate Notes and Bonds		0		4,062
Accrued interest income		0		84
Total restricted investments available for sale		0		9,153
Total restricted cash and cash equivalents and restricted investments available for sale	$	750	$	22,602

Unrealized Gain Loss On Restricted Investments [Table Text Block]

	June 30, 2011
Gross unrealized holding gains	$	36
Gross unrealized holding losses		4

Schedule Of Comprehensive Income Loss Restricted Investments [Table Text Block]

	Six Months Ended June 30,						Three Months Ended June 30,
	2012			2011			2012			2011
(Decrease)/increase in comprehensive income	$	(3	)	$	(13	)	$	(1	)	$	2

Realized Gains And Proceeds From Sale Of Restricted Investments [Table Text Block]

	Six and Three Months Ended June 30, 2012
Proceeds from sale of restricted investments	$	2,015
Realized gain on sale of restricted investments		3